Liquid-seal check-valve



W. M. HUGHES.

LIQUID SEAL CHECK VALVE.

APPLICATION FILED DEC.2. 1918.

1,362,535, Patented Dec. 14, 1920.

fnv-en/ior;

'W. M. Hwy/z as.

UNITED-STATES PATENT OFFICE.

WILLIAM M. nuenEs, E AENcLIEEE, NEAE SYDNEY, NEwsour wALEs,

AUSTRALIA.-

mii ID-sEAL CHECK-VALVE.

To all whom it may concern: i

Be it known that I, WILLIAM MARTIN HUGHES, subject of the King of Great Liquid-Seal Check-Valves, of which the folgases, vapors, and gasolene and like volatile.

. very lightly loaded check valve in 'fair condilowing is a specification.

Thisinvention relates-to check valves for hydrocarbon oils, and it consists ina loaded valve of puppet or mushroom type-fitted in a casing which is formed with a pocket below and around the valve seat adapted to contain an oil oriother viscous nonvaporizable liquid which is not soluble in and is of higher gravity than the volatile oil passing through the service in which the valve is fitted. It is well-known that flow of gases,

vapors, and gasolene and like volatile oils can be checked absolutely by a lightly loaded check valve'only when the valve and its seating are in perfect condition, and that ordinarily a leak flow past the valve face occurs owing to the susceptibility of gases, vapors, and such liquids to trickle-through small orifices. On the other hand a tion is effective for preventing leak flow of liquids havinga" viscosity valve of the same orderas water of a higher viscosity. Consequently, it has been conceived that if a lightly loaded checkvalve be arranged to work in a seal of non-volatile viscous liquid it will under all working conditions effectively prevent a leak How of gases, vapors, and volatile oils such as gasolene which otherwise would trickle past it.

It will be obvious that the design of the valve casing may be conformed to the conditions and situation of use so-long as the essential condition is satisfied that the valve 1s surroun ed by a pocket in which the liquid seal i contained and that said pocket is proportioned and arranged so that when the valve is opened the volatile liquid may bubble through the seal liquid and when the valve is closed the seal liquid will immerse the valve and the valve face and effectively check leak flow of the gas, vapor, or volatile fluid.

The sealing Iliquid 'may be mercury, glycerin, castor oil, or other liquid material which is of greater gravity than and Application filed December 2, 1918.

Specification of Letters Patent. Patented Dec. 14, 1920.

Serial No. 264,94fi.

is insoluble in and immiscible with the fluid the flow of which the valve is intended to control.

In the accompanying drawing Figure 1 is .a vertical section through a lift-up check guide sleeve 14 for the valve spindle 15 v and for the valve loading spring 16. When the valve is sufficiently weighty and the conditions of use permit, the spring 16 may be omitted. 17 isa cup surrounding the valve seat and carried up sufiiciently high to form a pocket of sufficient capacity to hold the charge of sealing liquid. This cup is carried by brackets or lugs 18 on the inclosing casing 19. The casing 19 terminates at the foot in the pipe socket neck 20.

In the arrangement shown in Figs. 2 and 3, the seal liquid pocket 21 surrounds the valve seat 22 which is formed in the lower end of the tubular throat 23, into which the intake socket end 24-. of the fitting connects. The delivery socket end, 25 of the fitting connects into the upper part of the seal pocket 21, and said pocket is made of suflicielit capacity below the socket 25 to carry the charge of sealing liquid 26. The valve 27 is loaded by a spring 28 and is fitted with guide vanes 29 which work in the tubular throat 23.

' In operation, the flow of gas, vapor, gasolene, or other volatile liquid passes in the 1. A check valve comprising a valve seat,-

a valve fitted thereto, means for holding said valve lightly on said seat, a casing surrounding said seat and valve and adapted to :arry sealing liquid immersing the valve, and being also provided with an inlet orifice, and a pocket on the inlet side of the seat intermediate saidseat and the inlet orifice and adapted to hold sealing liquid which passes over the face of the valve.

2. A check valve. comprisingan external casing provided with inlet and delivery connections, a cup pocket supported in said casing, a valve chamber formed within said casing and positioned partially within said cup pocket, a valve seat formed in the lower part of said valvechamber, a valve in said chamber co-acting with said seat, means for; lightly loading said valve, and means for scribed.

3. In a check valve, a lightly loaded valve and its seating immersed in a body'of a relatively viscous sealing liquid in such a manner that the liquid also acts to close the valve, substantially as described.

4. A check valve comprising an external casing formed Within an inlet, a cup pocket guiding said valve, substantially as dehaving a portion formed integral with the bottom of the casing so as to be supported centrally thereof and in spaced relation thereto, a valve chamber formed integral with the top of the' casing and having its lower portion positioned in spaced relation to the bottom and walls of the cup pocket having its ends arranged against the valve and tion.

In testimony whereof I have aflixed my signature in the presence of two witnesses.

\VILLIA M M. HUGHES.

the lower part of the delivery connec- Witnesses:

R0BT. ZEY, Y

W. J, HUMPHREYS. 

